COMPARATIVE ASSESSMENT OF THE CONTRIBUTION OF ELASTOMER TO FORMATION OF THERMOPHYSICAL CHARACTERISTICS OF RESISTIVE COMPOSITE MATERIALS BASED ON MICROGRAPHS OF THE STRUCTURE

JZXFOB

Abstract

It is shown that when designing resistive composite materials, it is important to provide a set of electrophysical and thermophysical parameters. Elastomers filled with technical carbon are considered, which are designed for a wide range of performance characteristics. A comprehensive study of the thermophysical properties of elastomers filled with technical carbon has been performed. The influence of the type of elastomer on the thermophysical characteristics is shown: thermal conductivity coefficient, thermal conductivity coefficient, specific heat capacity. It has been experimentally established that they decrease when replacing crystalline rubber as a binding base with an amorphous one. The relationship between the entropy of a textural feature and thermophysical characteristics with the type of elastomer is experimentally substantiated. A correlation has been established between the entropy of a textural feature determined from micrographs of the structure, the value of the volumetric electrical resistance of the material, and its thermophysical characteristics. The range of changes in the thermophysical characteristics and entropy of a textural feature depending on the type of elastomer is compared. It is concluded that the textural parameter is suitable for evaluating the contribution of elastomer to the formation of volumetric electrical resistance and its thermophysical characteristics, which expands the possibility of solving problems of designing materials with specified properties.